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363
METALLURGY OF IROH AND STEEL,
TABLE XIV-D.
Influence of Thickness of Bar upon the Physical Properties when all Pieces are Rolled from Billets Three Inches Square.
Heat number.	Size of har; in Inches.	Ultimate strength; Ibs. per square Inch.		Elastic limit; pounds per square inch.		Elongation In 8 inches; per cent.		Reduction of area; per cent.	
		Finished at usual temperature.	Finished at dull red heat.	"S o M T5 * * .Ss ft	Finished at dull red heat.	i "M M <3)	Finished at dull red heat.	i HrH4^ « S M	Finished at dull red heat.
4605	2X1!	51370 51070 50850 52960 55560	50960 52430 51970 52280 55000	82860 88200 85700 86220 47380	83760 86050 87860 40040 42500	84.50 81.50 82.50 81.25 80.00	82.75 80.00 80.00 82.50 29.00	59.6 59.2 60.8 68.2 53.2	56.7 57.2 58.9 68.8 60.4
9227	1	59690 60350 60950 62230 66340	60190 60510 61390 63970 68130	87000 88560 42110 42600 49860	40130 40470 42090 49200 56180	85.00 29.50 80.00 25.75 27.50	80.00 82.50 80.50 29.25 24.00	55.4 58.8 60.0 55.9 56.6	58.7 61.7 55.9 61.9 65.7
1509	2x^1	65600 67310 67470 69210 72100	67090 67660 68800 70200 ; 77460	40980 48090 44090 47950 54060	45830 45170 46610 53680 64430	29.50 26.25 26.25 26.50 27.75	25.50 25.50 28.00 25.25 15.25	50.9 47.1 63.2 54.1 55.0	44.8 46.2 50.3 56.9 48.2
1440	2xj|	72440 72570 72950 75620 77500	74060 68150 • '78710 71260 80240	46440 46200 48760 51160 60920   "	49480 45990 50540 54660 69360	27.50 27.25 26.25 25.00 26.00	24.00 28.50 22.00 27.25 18.50	45.7 47.8 52.1 53.5 46.8	42.0 58.4 43.1 49.4 53.0
TABLE XIV-B. Effect of Hammering Boiled Acid Open-Hearth'Steel.
NOTE.—Chemical composition in per cent.; C, .40; Mn, .86; P, .037; S, .04(5,
	<B      W	o	.-OS	a a			
	*®|		fla bflS	j*i	'<£ 1	<o	
	•S rt*3 »	.-on	§ «	ri *	d	..	
1	|s|!	"rt ® HP.	K *-l lap,	g?|s	"3	1	Remarks.
o	<H * X O	"2-3	*i •	1 33®	B§	S •	
"£	g|||	s|§	l||	e o $ as 55 S3	c? A<	ll	
E	So"1"	S	p	H	P3	§°	
A	6	54460	89240	29.00	41.2	61.0	Finished at dull yellow.
B C	6 5	41500 50800	88660 89070	28.00 26.50	42.2 88.0	46.8 57.0	Annealed at bright yellow. Finished at dull yellow.
D E F G H K L	4 3 2 2 4 3 2 5	55240 51170 51880 57140 45620 47830 51000 54020	87800 86450 89280 92400 89900 88800 88760 86400	25.50 27.50 28.00 28.00 27.00 25.00 27.50 7.50	87.0 89.3 41.8 42.0 88.9 34.3 42.7 5.8	63.8 59.2 58.1 61.8 50.8 58.9 57.5 62.5	Finished at dull yellow. Finished at dull yellow. Finished at dull yellow. Finished at cherry red. Finished at dull yellow. Finished at dull yellow. Finished at dull yellow Annealed at white heat.
M	2	54700	93860	24.50	34.8	58.6	Finished at cherry red.